gear ratios merc 90hp

[bobvdinghyracer]

a buddy of mine has a 1999 merc 90hp triple ... said the gear ratio is 2.3 and he is wondering what are his options if any ... goal is to drop it down to ?? what fits if anything and what is avaible anybody..... this is on a full size 14ft 3 point hydro / jackplate etc ... runs in mid 60`s / he wants to drop the gearing so he can run less pitch and diameter he believes that he has way too much bite for the boat and wants a lot of pitch with less diameter , he has several smaller dia, props but they do not have enough pitch for the current gearing ................. anyone ??? my ecpertise is with the smaller engines / hydros an utilities not the bigger motors btw (started with a 17p and has gone all way to a 26 ... motor still will run up over 6000 plus with no problem)